South Korean tech firm Samsung Electronics on Tuesday said it projects its fourth quarter operating profit will decrease about 35% from last year. The company projects quarterly sales also will decrease 4.91%. The South Korean tech giant projects operating profit of about 2.80 trillion Korean won ($2.8 billion) in the fourth quarter, compared to 4.31 trillion won reported last year. It reported operating profit of about 2.43 trillion won in the third-quarter. The company also expects fourth-quarter consolidated sales of about 67 trillion won compared to 70.46 trillion won last year. It reporte…